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Water treatment dechlorination tablet and production methodRelated Patent Categories: Compositions, Compositions Containing A Single Chemical Reactant Or Plural Noninteractive Chemical Reactants; I.e., Not Vis-a-visWater treatment dechlorination tablet and production method description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060102874, Water treatment dechlorination tablet and production method. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims priority of Chinese application Serial No. 200410068148.5, filed Nov. 15, 2004, for WATER TREATMENT DECHLORINATION TABLET AND PRODUCTION METHOD. FIELD OF THE INVENTION [0002] The present invention relates generally to adding a special designed and produced agent to water, or industrial water, or chlorinated wastewater for enhancing its quality. In particular, the present invention is directed to an agent that is used to remove halogens, such as chlorine, bromine and iodine, from water or wastewater, and the method of making the agent. BACKGROUND OF THE INVENTION [0003] The quality of water and treated wastewater is affected by non-volatile halogens, such as chlorine, bromine and iodine, existing in water and chlorinated wastewater. U.S. Pat. No. 4,364,835 describes the application of sulfur dioxide, or soluble sulfite, or bisulfite for removing non-volatile chlorine residual from water. This type of non-volatile chlorine residual exists in chlorinated drink water, treated sewage and industrial wastewater. Sulfite salts can be applied to remove chlorine residual from water, or at least destroy most non-volatile chlorine residuals. U.S. Pat. No. 4,816,177 uses a protein containing, organic gel forming binder to form one type of sodium sulfite tablet that can be applied to remove chlorine from water and chlorinated wastewater. In practical application, the protein containing, organic gel forming binder is released into water with dissolved tablet material. Foams and small white pieces of floating material exist on the surface of dechlorinated water. Therefore, the secondary pollution, visual pollution, is caused by the binder and the other inert material in the tablets. The dissolution rate of this type of dechlorination tablet depends upon the amount of binder used in a tablet and the production pressure. At present, the dissolution rate of some dechlorination tablets on the market cannot be easily adjusted for different applications. BRIEF DESCRIPTION OF THE INVENTION [0004] The present invention supplies a new type of dechlorination tablet that minimizes secondary pollution and avoids foam and small white pieces of floating material. The dissolution of the tablet produced by the present invention is controllable. Another technical point of the present invention is the production method of the new dechlorination tablet. [0005] The present invention uses a technology to produce one type of dechlorination agent in tablet shape for water treatment. This type of water treatment agent contains 70 to 91 weight percent active sodium sulfite ingredients, 0.5 to 4.2 weight percent mixture of color liquid and liquid sugar binder, 0.05 to 1 weight percent stearate salt used as a dissolution rate control chemical, and 2 to 3.75 weight percent inert material, such as talc powder, etc. [0006] In order to increase the ease of release of the tablet from the mold, the tablet in the present invention also contains 0.05 to 1 weight percent of another type of stearate salt as a mold release chemical. [0007] The liquid mixture of color liquid and liquid sugar binder mentioned in the present invention is a liquid solution of a small quantity of a food dye, liquid sugar and water. [0008] The liquid sugar binder can be made from one or more liquid food sugar mixtures, such as liquid barley sugar mixture, liquid sucrose mixture, liquid lactose mixture, liquid beet sugar mixture, liquid corn sugar mixture and liquid glucose mixture. [0009] The regular liquid corn sugar mixture can be made of liquid sugar, liquid corn sugar, maltodextrin, glycol alginic acid, carboxymethylcellulose, sodium chloride, diolefinic acid, sodium benzoate, sodium metaphosphate, natural or artificial flavor agent, color agent and soft water. [0010] The regular liquid sugar mixture can be made of liquid sugar, glycol alginic acid, carboxymethylcellulose, sodium chloride, diolefinic acid, sodium benzoate, sodium metaphosphate, natural or artificial sweet flavor agent, color agent and soft water. [0011] The regular liquid barley sugar mixture can be made of liquid sugar, liquid corn sugar, liquid barley sugar, liquid maltodextrin, glycol alginic acid, carboxymethylcellulose, diolefinic acid, sodium benzoate, sodium metaphosphate, natural or artificial sweet flavor agent, color agent and soft water. [0012] The dissolution rate control chemical mentioned in the present invention can be selected from one or more stearate salts, such as magnesium stearate, calcium stearate, barium stearate, lead stearate, zinc stearate, sodium stearate, strontium stearate, cadmium stearate, lithium stearate, and aluminum stearate. [0013] The weight percent of active sodium sulfite in the tablet is higher than normal dechlorination tablets. A high weight percent of sodium sulfite can be achieved, for example, 80 to 90 weight percent. [0014] The dechlorination tablet of the present invention can be in the shape of a tablet or pillar. The diameter is from 30 millimeters to 80 millimeters, and the thickness or height is from 10 millimeters to 30 millimeters. [0015] One production method regarding above water treatment dechlorination tablet is presented here. Active sodium sulfite, a mixture solution of color water and liquid sugar binder, one type of stearate salt used as dissolution rate control chemical, another type of stearate salt used as a mold release chemical, and inert materials are mixed together completely. The mixture is placed in a mold and is then pressed in a tabletting press under 7,000 to 25,000 kg pressure force. The density of the formed tablet is from 1.7 to 2.1 gram/cm.sup.3. The finished tablet is dried in an oven under the temperature of between 70.degree. C. and 130.degree. C. The baking time is between one-half and three hours. After cooling down, the dried tablet is ready for wrapping and packing. [0016] The dechlorination tablet of the present invention is made from sodium sulfite as the active ingredient, a mixture solution of color liquid and liquid sugar binder, one type of stearate salt used as dissolution rate control chemical, another type of stearate salt used as a mold release chemical and an inert material. The tablet is used for removing halogens from liquid fluid media. The liquid sugar binder minimizes the occurrence of foam and small white pieces of floating material during water dechlorination. The secondary pollution of treated water is minimized. High weight percent of sodium sulfite ensures that chlorine residual can be removed from water or chlorinated wastewater effectively. The tablet dissolution rate is controlled or adjusted by one type of stearate salt that is used as a dissolution rate control chemical. The tablet is evenly dissolved in the water or chlorinated wastewater, and the tablet dissolution rate is controlled in a required range. Therefore, unnecessary consumption of tablets is reduced. The tablet has good strength and shape which reduce the chances of tablet damages during shipping time. BRIEF DESCRIPTION OF THE DRAWINGS [0017] FIG. 1 is a drawing of a dechlorination tablet. [0018] FIG. 2 is a drawing of a dispensing apparatus with dechlorination tablets. DETAILED DESCRIPTION OF THE INVENTION Continue reading about Water treatment dechlorination tablet and production method... Full patent description for Water treatment dechlorination tablet and production method Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Water treatment dechlorination tablet and production method patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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